Keystones — Capstone
Five GCSE retrieval questions · 15 July 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 117. What are the numbers?
Answer: 38, 39, and 40 -
2. Algebra
Find the next term: 1, 2, 4, 7, ...
Answer: 11 -
3. Geometry
Adjacent = 13cm, hypotenuse = 19cm. Find the angle
Answer: 46.8° -
4. Ratio
Calculate 20.7% of 755
Answer: 156.29 -
5. Statistics
The mean of 5 numbers is 21. If 4 of them are 28, 22, 26, 27, what is the missing number?
Answer: 2